In this paper we explore the tensions that exist between two health promotion discourses prevalent in school based Health Education. We use one example from a widely used curriculum resource and one classroom episode to explore discourses related to obesity prevention, often described as an obesity epidemic by media and health professionals alike. Our argument is that these discourses work to produce the "unhealthy other" that everyone is then in danger of becoming and in the process produce moral judgements and reinforce stereotypes about overweight and obese people. In so doing they run counter to health education and other discourses that seek to promote self-esteem and body acceptance in students no matter what their shape and size. (Contains 3 footnotes.)